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首页> 外文期刊>Journal of oceanography >Influence of Current Width Variation on the Annual Mean Transport of the East Sakhalin Current: A Simple Model
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Influence of Current Width Variation on the Annual Mean Transport of the East Sakhalin Current: A Simple Model

机译：电流宽度变化对萨哈林东部流年平均输运的影响：一个简单模型

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摘要

Recent observations suggest that the annual mean southward transport of the East Sakhalin Current (ESC) is significantly larger than the annual mean Sverdrup transport. Motivated by this observational result, transport of a western boundary current has been investigated using a simple numerical model with a western slope. This transport is defined as the instantaneous barotropic transport integrated from the western boundary to the offshore point where the barotropic velocity vanishes. The model, forced by seasonally varying wind stress, exhibits an annual mean of the western boundary current transport that is larger than that of the Sverdrup transport, as observed. The southward transport from October to March in the model nearly equals the instantaneous Sverdrup transport, while the southward transport from April to September decreases slowly. Although the Sverdrup transport in July vanishes, the southward transport in summer nearly maintains the annual mean Sverdrup transport, because the barotropic Rossby wave cannot intrude on the western slope. This summer transport causes the larger annual mean. Although there are some uncertainties in the estimation of the Sverdrup transport in the Sea of Okhotsk, the seasonal variation of the southward transport in the model is qualitatively similar to the observations.
机译：最近的观察表明，东萨哈林海流（ESC）的年平均向南输送量明显大于Sverdrup的年平均输送量。受此观测结果的激励，已使用具有西坡的简单数值模型研究了西边界电流。这种运输被定义为从西边界到正压速度消失的近海点的瞬时正压运输。如所观察到的那样，该模型在季节性变化的风应力的作用下表现出的西部边界电流年平均值大于Sverdrup的年平均值。该模型中从10月到3月的南向运输几乎等于瞬时Sverdrup运输，而从4月至9月的南向运输缓慢减少。尽管7月的Sverdrup输运消失了，但夏季的南向输运几乎保持了Sverdrup的年平均输运量，因为正压的Rossby波不能侵入西坡。夏季的运输导致较大的年均值。尽管估计鄂霍次克海中的Sverdrup运移存在一些不确定性，但该模型中南移的季节变化在质量上与观测值相似。

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